In this paper the design of a 3rd-order 16 bit 20 kHz-bandwidth discrete-time σδ modulator with voltage- controlled oscillator (VCO)-based quantizer is presented. This design is motivated by the trends towards die size and power consumption reduction together with performance robustness. In this direction, the flash converter embedded in a multi-bit σδM is here replaced by a VCO and digital counter, resulting in a compact fully-digital quantizer implementation. This solution would greatly exploit the technology scaling. Moreover in the proposed feed-forward architecture all feed-forward paths are summed within the last integrator of the σδ loop filter, thereby eliminating the need for an analog summation amplifier at the quantizer input The presented 3rd-order σδM features 110 dB-SNR, 104 dB-SNDR (i.e. 16 bit-ENOB). © Springer Science+Business Media, LLC 2011.
De Blasi, M., Delizia, P., D’Amico, S., Baschirotto, A. (2012). A 16 bit 20 kHz bandwidth discrete-time ΣΔ modulator with VCO-based quantizer. ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 72(3), 521-529 [10.1007/s10470-011-9664-z].
A 16 bit 20 kHz bandwidth discrete-time ΣΔ modulator with VCO-based quantizer
BASCHIROTTO, ANDREA
2012
Abstract
In this paper the design of a 3rd-order 16 bit 20 kHz-bandwidth discrete-time σδ modulator with voltage- controlled oscillator (VCO)-based quantizer is presented. This design is motivated by the trends towards die size and power consumption reduction together with performance robustness. In this direction, the flash converter embedded in a multi-bit σδM is here replaced by a VCO and digital counter, resulting in a compact fully-digital quantizer implementation. This solution would greatly exploit the technology scaling. Moreover in the proposed feed-forward architecture all feed-forward paths are summed within the last integrator of the σδ loop filter, thereby eliminating the need for an analog summation amplifier at the quantizer input The presented 3rd-order σδM features 110 dB-SNR, 104 dB-SNDR (i.e. 16 bit-ENOB). © Springer Science+Business Media, LLC 2011.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.